
| Your Zone | Average Annual Minimum Temperature (degrees in F) | 
|---|---|
| 1 | Below – 50 | 
| 2a | – 45 to – 50 | 
| 2b | – 40 to – 45 | 
| 3a | – 35 to – 40 | 
| 3b | – 30 to – 35 | 
| 4a | – 25 to – 30 | 
| 4b | – 20 to – 25 | 
| 5a | – 15 to – 20 | 
| 5b | – 10 to – 15 | 
| 6a | -5 to – 10 | 
| 6b | 0 to – 5 | 
| 7a | 5 to – 0 | 
| 7b | 10 to 5 | 
| 8a | 15 to 10 | 
| 8b | 20 to 15 | 
| 9a | 25 to 20 | 
| 9b | 30 to 25 | 
| 10a | 30 to 30 | 
| 10b | 40 to 35 | 
| 11 | 40 and above |